The Panamera was discussed. I brought it up and everyone basically said they'd wait for me to build one...
The premise was that you could go into a dealer when the car was produced and jsut buy one. You would have had no problem walking into a Lotus dealer and buying a Carlton seeing how the wiki article said production fell 150 short of what they were hoping to sell. Examples of cars that wouldn't count would be something like the M3-GTR or Cobra R where the manufacturer specifically set a very low number to build, although those are both coupes anyway. I'm not sure there are any sedans in the game that fit into that area other than the actual race cars (Aussie Touring and DTM cars)